Edward heaton



l E. 'HEATON SHANK SPRING.

1\Io.'75,266.` Patented Mau.l l0, 1868.

@uitrit tsrtzs @sind @Hirn EDWARD HEATON, OI"l NEW HAVEN, CONNECTICUT`Letters Patent No. 75,266, dated March 10, 1868,.

v IMPROVEMENT IN SHANK-SPRIN GS.

T0 ALL WHOM IT MAY CONCERN: l

Be it known that I, EDWARD HEATO'N, ofNew Haven, in the county of NewHaven, und State of Connec# tient, have invented n new Improvenient inShank-Springs for boots and shoes and I do hereby declare the following,when token in connection with the accompanying drawings and the lettersofreference marked thereon, to be a. full, clear, and exact descriptionof the same, and which said drawings constitute part o f this specification, and represent, in- I Figure I, a single shank,

Figure 2 the manner of cutting, and 1n v Figure 3 a diagram,illustrating the position of the spring in the shank of the boot orshoe.

This invention relates to an `improvement'. in steel springs, such asare inserted in boots and shoes, and-the invention consists in themanner ot' cutting the Shanks from sheet met-al, so that no portonof themetal is wasted.

'.lo enable others to construct -my improvement, I will proceed -todescribe the same as illustrated lin the accompanying drawing/ss i It isnecessary to give to the springs a curve, correspondingl to the shape ofthe foot, and consequently the reverse for right 'or left boots orshoes, as seen in fig. 3, the spring A being for a right boot, and B fora left, the point a being the same in bot-h right Vand left. Heretoforcthis curve has beengiven by'cuttng thel spring of different widths atdilerent points inthe spring, which necessitntes no inconsidera-hlewaste of metal. To avoid this waste, and yet obtain the curve required,I form the spring as seen in iig. 1, the one edge being of reverse formprecisely as the other, so that one edge of one spring correspondsexactly to the opposite edge of another spring; that is to say, from asheet of metal the springs are cut, as seen in g. 2, and this may bedone by a shear, having its edge to correspond-to the edge of thesprings, and the metal fed into the shears. The springs are successivelycut from the sheet without any waste of metal, which saves a.large-expense in the cost ofthe dies, as cach dil'erent-sizedl spring,as heretofore formed, required a dieof precisely that size and form.

Having thus fully described my invention, what I claim as newnnduseful,and desire to secure by Letters Patent, is-

The construction of shank-springs, when eut or stamped out of the. sheetwithout scrap or waste, substantially as s'pecied. i

EDWARD HEATON.

Witnesses:

A. J.'T1BBITs, J. H. SHUMWAY,

